On the usefulness of bilateral comparison to tracking turbulent chemical odor plumes

Webster, D. R.; Rahman, S.; Dasi, Lakshmi Prasad

doi:10.4319/lo.2001.46.5.1048

Cited by 49 publications

(31 citation statements)

References 25 publications

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“…The technique has been used extensively and the LIF system for this study is similar to those developed by previous investigators (e.g., Crimaldi and Koseff 2001;Webster et al 2003). Threedimensional LIF is an experimental technique that builds upon PLIF and can be used to measure the nearly instantaneous three-dimensional concentration field (Tian and Roberts 2003;Van Vliet et al 2004).…”

Section: Materials and Proceduresmentioning

confidence: 99%

“…Temporal sampling capabilities also limit detection of small-scale odorant filament structure. The chemosensory response rate for crustaceans is believed to be in the range of 5 Hz (Gomez and Atema 1996), which is too slow to resolve the time-scales of concentration fluctuations (Webster and Weissburg 2001). Further, Crimaldi et al (2002a) examined the influence of sensor size and sampling frequency on the signal pattern gathered by a virtual antennule in a turbulent odorant plume in the laboratory.…”

Section: Materials and Proceduresmentioning

confidence: 99%

“…Consequently, we used a power law control signal to the mirrors to increase the beam residence time in the downstream (low concentration) region relative to that in the upstream (high concentration) region. Webster et al (2003) describe the use of nonuniform angular speeds of the horizontal mirror in PLIF experiments for flow and release conditions similar to this study. In the current experiments, a power law with an exponent of n = 0.75 was used to control the sweep rate and yielded the most uniform images (i.e., the voltage signal sent to the mirror was (1) where E 0 and E 1 correspond to the start and end voltages, respectively, and T is the period of the horizontal sweep).…”

Section: Materials and Proceduresmentioning

confidence: 99%

“…Outer chemosensors-A contrast between left and right distal chemosensors, usually the legs, could mediate turning towards the interior of the plume (Zimmer-Faust et al 1995;Webster et al 2001). We aimed to assess the chemical bias across the crab body to provide insight into whether crabs are responding to spatial asymmetry in the chemical distribution.…”

Section: Fig 5 Example Concentration Field Measurements Around An Amentioning

confidence: 99%

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Three‐dimensional odorant concentration measurements around actively tracking blue crabs

Dickman

Webster

Page

et al. 2009

Limnology & Ocean Methods

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Blue crabs (Callinectes sapidus) and other aquatic organisms locate food and mates by tracking turbulent odorant plumes. The odorant concentration fluctuates unpredictably due to turbulent transport, and many characteristics of the fluctuation pattern have been hypothesized as useful cues for orienting to the odorant source. To make a direct linkage between tracking behavior and odorant signal properties, we developed a laserinduced fluorescence measurement system to quantify the instantaneous three‐dimensional (3D) concentration field surrounding actively tracking blue crabs. The data suggest a connection between upstream walking speed and bursts of odorant concentration arriving at the antennule chemosensors, which are located near the mouth region. Specifically, we note rapid upstream walking speed when high concentration bursts arrive at the antennules location and a decrease in upstream walking speed in the absence of odorant filaments near the antennules. Additionally, we note transverse crab movements in apparent response to the transverse distribution of the odorant concentration field. Specifically, asymmetry of the odorant concentration distribution at the elevation of the leg chemosensors is associated with subsequent crab position adjustments in the transverse direction. The methods described here allow for powerful and direct tests of chemosensory navigation strategies in blue crabs, as well as other macroscopic aquatic animals.

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Section: Materials and Proceduresmentioning

confidence: 99%

Section: Materials and Proceduresmentioning

confidence: 99%

Section: Materials and Proceduresmentioning

confidence: 99%

Section: Fig 5 Example Concentration Field Measurements Around An Amentioning

confidence: 99%

See 2 more Smart Citations

Three‐dimensional odorant concentration measurements around actively tracking blue crabs

Dickman

Webster

Page

et al. 2009

Limnology & Ocean Methods

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“…The "odor landscape" at these scales is thus complex and dynamic (Atema 1996;Moore and Crimaldi 2004), with odor sources potentially being located at a considerable distance from the organism. Organisms generally react to changes in concentration over space, using sensory organs that are often bilateral and are moved to detect changes in concentrations in the odor plumes and to increase the rate of fluid flow past them (Webster et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Early Molluscan Evolution: Evidence From the Trace Fossil Record

Seilacher

Hagadorn

2010

PALAIOS

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For many organisms, chemoreception is critical for activities such as foraging, the detection of potential mates, and the avoidance of possible predators. The spatial pattern of odors, the odor landscape, is a function of the distribution of the odor sources and of fluid dynamics. Microscopic organisms, and probably most infaunal organisms, are in a physical realm where the detection of distant odor sources is controlled by diffusion and movement that takes place in response to chemical gradients. For larger organisms, chemical detection of distant sources is largely controlled by turbulence and thus by spatially and temporally complex odor plumes.An individual-based, spatially explicit movement model allows the examination of the importance of contact and distant chemoreception for foraging movements in spatially heterogeneous and patchy environments. Gain curves allow the importance of sensory range in settings of differing degrees of patchiness to be compared. As patchiness increases, distant chemoreception becomes increasingly important for efficient foraging.Movement patterns within patches are different from those between patches. The spatial distribution of resources, therefore, should be a major control of trace geometry.During the Ediacaran-Cambrian interval, the spatial complexity and patchiness of the marine odor landscape may have increased due to disruption of Neoproterozoicstyle microbially bound substrates and the packaging of biomass into spatially discrete carcasses and fecal pellets. At the same time, larger and non-infaunal mobile bilaterians would have entered a fluid regime dominated by turbulence. These changes may be partially responsible for the evolution of external bilateral sensory organs.

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Non‐visual cues and indirect strategies that enable discrimination of asymmetric mates

Vijendravarma

Léopold

2022

Ecology and Evolution

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The postulates of developmental instability–sexual selection hypothesis is intensely debated among evolutionary biologists, wherein despite a large amount of empirical data, evidence for or against it has been largely inconclusive. A key assumption of this hypothesis is that animals assess symmetry in potential mates as an indicator of genetic quality (developmental stability), and consequently use this information to discriminate against those with higher asymmetries while choosing mates. However, the perceptional basis that must underlie such discriminatory behavior (is symmetry a signal or is symmetry signaled) is not clearly defined. It is also argued that since asymmetry levels in natural populations are very low, the low signal‐to‐noise ratio would make accurate assessment of symmetry both difficult and costly. Rather than attempting to validate this hypothesis or even as to whether animals assess mate symmetry, this review simply aims to examine the plausibility that animals perceive symmetry (directly or indirectly) and consequently discriminate against asymmetric mates in response to perceived irregularities during courtship. For this, we review mate choice and courtship literature to identify potential sensory cues that might advertise asymmetry or lead to discrimination of asymmetric individuals. Although signaling associated with mate choice is commonly multimodal, previous studies on asymmetry have mainly focused on visual perception. In the light of a recent study (Vijendravarma et al., 2022, Proceedings of the National Academy of Sciences of the United States of America , 119, e2116136119), this review attempts to balance this bias by emphasizing on non‐visual perception of asymmetry. In conclusion, we discuss the methodological challenges associated with testing the role of multimodal cues in detecting mate asymmetry, and highlight the importance of considering ecological, behavioral, and evolutionary aspects of animals while interpreting empirical data that test such hypothesis.

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On the usefulness of bilateral comparison to tracking turbulent chemical odor plumes

Cited by 49 publications

References 25 publications

Three‐dimensional odorant concentration measurements around actively tracking blue crabs

Three‐dimensional odorant concentration measurements around actively tracking blue crabs

Early Molluscan Evolution: Evidence From the Trace Fossil Record

Non‐visual cues and indirect strategies that enable discrimination of asymmetric mates

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